Subject of the first part of this publication series was the development and manufacturing of technical catalysts within the Leuna Werke company from 1921 - 1945. Part II as well as part III and IV will focus on this topic as well, looking at the years from 1945 to 1991. Within this timeframe, a high-performing research and development as well as an efficient production line for new catalysts was implemented, facing a new and challenging macroeconomic environment. In recognition of the fact that the first newly developed catalyst after WW II was a reforming catalyst, this article will describe the development path of this group of catalysts as well as the closely related isomerization catalysts.